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accounts/usbwallet: support webusb for Trezor wallets

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This commit is contained in:
Guillaume Ballet 2019-05-16 14:37:36 +02:00 committed by Péter Szilágyi
parent 7a22da98b9
commit 4799b5abd4
No known key found for this signature in database
GPG Key ID: E9AE538CEDF8293D
12 changed files with 443 additions and 34 deletions
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22
accounts/usbwallet/hub.go
View File

@ -89,6 +89,12 @@ func NewTrezorHub() (*Hub, error) {
return newHub(TrezorScheme, 0x534c, []uint16{0x0001 /* Trezor 1 */}, 0xff00, 0, newTrezorDriver)
}
// NewWebUSBTrezorHub creates a new hardware wallet manager for Trezor devices with
// firmware version > 1.8.0
func NewWebUSBTrezorHub() (*Hub, error) {
return newHub(TrezorScheme, 0x1209, []uint16{0x53c1 /* Trezor 1 WebUSB */}, 0, 0, newTrezorDriver)
}
// newHub creates a new hardware wallet manager for generic USB devices.
func newHub(scheme string, vendorID uint16, productIDs []uint16, usageID uint16, endpointID int, makeDriver func(log.Logger) driver) (*Hub, error) {
if !hid.Supported() {
@ -148,9 +154,19 @@ func (hub *Hub) refreshWallets() {
return
}
}
for _, info := range hid.Enumerate(hub.vendorID, 0) {
infos, err := hid.Enumerate(hub.vendorID, 0)
if err != nil {
if runtime.GOOS == "linux" {
// See rationale before the enumeration why this is needed and only on Linux.
hub.commsLock.Unlock()
}
log.Error("error enumerating USB enumeration: ", "code", err)
return
}
for _, info := range infos {
for _, id := range hub.productIDs {
if info.ProductID == id && (info.UsagePage == hub.usageID || info.Interface == hub.endpointID) {
_, pid, endpoint, _ /* FIXME usageID */ := info.IDs()
if pid == id && ( /* FIXME usageID == hub.usageID || */ endpoint == hub.endpointID) {
devices = append(devices, info)
break
}
@ -169,7 +185,7 @@ func (hub *Hub) refreshWallets() {
)
for _, device := range devices {
url := accounts.URL{Scheme: hub.scheme, Path: device.Path}
url := accounts.URL{Scheme: hub.scheme, Path: device.GetPath()}
// Drop wallets in front of the next device or those that failed for some reason
for len(hub.wallets) > 0 {

2
accounts/usbwallet/trezor.go
View File

@ -36,6 +36,8 @@ import (
"github.com/golang/protobuf/proto"
)
var ErrInvalidDeviceType = errors.New("trezor: invalid device type")
// ErrTrezorPINNeeded is returned if opening the trezor requires a PIN code. In
// this case, the calling application should display a pinpad and send back the
// encoded passphrase.

2
accounts/usbwallet/wallet.go
View File

@ -78,7 +78,7 @@ type wallet struct {
url *accounts.URL // Textual URL uniquely identifying this wallet
info hid.DeviceInfo // Known USB device infos about the wallet
device *hid.Device // USB device advertising itself as a hardware wallet
device hid.Device // USB device advertising itself as a hardware wallet
accounts []accounts.Account // List of derive accounts pinned on the hardware wallet
paths map[common.Address]accounts.DerivationPath // Known derivation paths for signing operations

6
node/config.go
View File

@ -507,6 +507,12 @@ func makeAccountManager(conf *Config) (*accounts.Manager, string, error) {
} else {
backends = append(backends, trezorhub)
}
// Start a USB hub for Trezor hardware wallets (WebUSB version)
if trezorhub, err := usbwallet.NewWebUSBTrezorHub(); err != nil {
log.Warn(fmt.Sprintf("Failed to start Trezor hub, disabling: %v", err))
} else {
backends = append(backends, trezorhub)
}
}
if len(conf.SmartCardDaemonPath) > 0 {
// Start a smart card hub

7
signer/core/api.go
View File

@ -151,6 +151,13 @@ func StartClefAccountManager(ksLocation string, nousb, lightKDF bool) *accounts.
backends = append(backends, trezorhub)
log.Debug("Trezor support enabled")
}
// Start a USB hub for Trezor hardware wallets (WebUSB version)
if trezorhub, err := usbwallet.NewWebUSBTrezorHub(); err != nil {
log.Warn(fmt.Sprintf("Failed to start Trezor hub, disabling: %v", err))
} else {
backends = append(backends, trezorhub)
log.Debug("Trezor support enabled")
}
}
// Clef doesn't allow insecure http account unlock.
return accounts.NewManager(&accounts.Config{InsecureUnlockAllowed: false}, backends...)

54
vendor/github.com/karalabe/hid/generic.go generated vendored Normal file
View File

@ -0,0 +1,54 @@
// hid - Gopher Interface Devices (USB HID)
// Copyright (c) 2019 Péter Szilágyi, Guillaume Ballet. All rights reserved.
package hid
import (
"C"
)
type GenericEndpointDirection uint8
// List of endpoint direction types
const (
GenericEndpointDirectionOut = 0x00
GenericEndpointDirectionIn = 0x80
)
// List of endpoint attributes
const (
GenericEndpointAttributeInterrupt = 3
)
// GenericEndpoint represents a USB endpoint
type GenericEndpoint struct {
Address uint8
Direction GenericEndpointDirection
Attributes uint8
}
type GenericDeviceInfo struct {
Path string // Platform-specific device path
VendorID uint16 // Device Vendor ID
ProductID uint16 // Device Product ID
device *GenericDevice
Interface int
Endpoints []GenericEndpoint
}
func (gdi *GenericDeviceInfo) Type() DeviceType {
return DeviceTypeGeneric
}
// Platform-specific device path
func (gdi *GenericDeviceInfo) GetPath() string {
return gdi.Path
}
// IDs returns the vendor and product IDs for the device
func (gdi *GenericDeviceInfo) IDs() (uint16, uint16, int, uint16) {
return gdi.VendorID, gdi.ProductID, gdi.Interface, 0
}

19
vendor/github.com/karalabe/hid/hid.go generated vendored
View File

@ -17,8 +17,8 @@ var ErrDeviceClosed = errors.New("hid: device closed")
// operating system is not supported by the library.
var ErrUnsupportedPlatform = errors.New("hid: unsupported platform")
// DeviceInfo is a hidapi info structure.
type DeviceInfo struct {
// HidDeviceInfo is a hidapi info structure.
type HidDeviceInfo struct {
Path string // Platform-specific device path
VendorID uint16 // Device Vendor ID
ProductID uint16 // Device Product ID
@ -35,3 +35,18 @@ type DeviceInfo struct {
// only if the device contains more than one interface.
Interface int
}
// GetPath returns the system-dependent path to the device
func (hdi *HidDeviceInfo) GetPath() string {
return hdi.Path
}
// IDs returns the vendor and product id of the device
func (hdi *HidDeviceInfo) IDs() (uint16, uint16, int, uint16) {
return hdi.VendorID, hdi.ProductID, hdi.Interface, hdi.UsagePage
}
// Type returns the type of the device (HID or generic)
func (hdi *HidDeviceInfo) Type() DeviceType {
return DeviceTypeHID
}

41
vendor/github.com/karalabe/hid/hid_disabled.go generated vendored
View File

@ -4,7 +4,7 @@
// This file is released under the 3-clause BSD license. Note however that Linux
// support depends on libusb, released under GNU LGPL 2.1 or later.
// +build !linux,!darwin,!windows ios !cgo
// +build !freebsd,!linux,!darwin,!windows ios !cgo
package hid
@ -22,30 +22,55 @@ func Enumerate(vendorID uint16, productID uint16) []DeviceInfo {
return nil
}
// Device is a live HID USB connected device handle. On platforms that this file
// HidDevice is a live HID USB connected device handle. On platforms that this file
// implements the type lacks the actual HID device and all methods are noop.
type Device struct {
DeviceInfo // Embed the infos for easier access
type HidDevice struct {
HidDeviceInfo // Embed the infos for easier access
}
// Open connects to an HID device by its path name. On platforms that this file
// implements the method just returns an error.
func (info DeviceInfo) Open() (*Device, error) {
func (info HidDeviceInfo) Open() (*Device, error) {
return nil, ErrUnsupportedPlatform
}
// Close releases the HID USB device handle. On platforms that this file implements
// the method is just a noop.
func (dev *Device) Close() error { return nil }
func (dev *HidDevice) Close() error { return ErrUnsupportedPlatform }
// Write sends an output report to a HID device. On platforms that this file
// implements the method just returns an error.
func (dev *Device) Write(b []byte) (int, error) {
func (dev *HidDevice) Write(b []byte) (int, error) {
return 0, ErrUnsupportedPlatform
}
// Read retrieves an input report from a HID device. On platforms that this file
// implements the method just returns an error.
func (dev *Device) Read(b []byte) (int, error) {
func (dev *HidDevice) Read(b []byte) (int, error) {
return 0, ErrUnsupportedPlatform
}
// Open tries to open the USB device represented by the current DeviceInfo
func (gdi *GenericDeviceInfo) Open() (Device, error) {
return nil, ErrUnsupportedPlatform
}
// GenericDevice represents a generic USB device
type GenericDevice struct {
*GenericDeviceInfo // Embed the infos for easier access
}
// Write implements io.ReaderWriter
func (gd *GenericDevice) Write(b []byte) (int, error) {
return 0, ErrUnsupportedPlatform
}
// Read implements io.ReaderWriter
func (gd *GenericDevice) Read(b []byte) (int, error) {
return 0, ErrUnsupportedPlatform
}
// Close a previously opened generic USB device
func (gd *GenericDevice) Close() error {
return ErrUnsupportedPlatform
}

263
vendor/github.com/karalabe/hid/hid_enabled.go generated vendored
View File

@ -4,7 +4,7 @@
// This file is released under the 3-clause BSD license. Note however that Linux
// support depends on libusb, released under LGNU GPL 2.1 or later.
// +build linux,cgo darwin,!ios,cgo windows,cgo
// +build freebsd,cgo linux,cgo darwin,!ios,cgo windows,cgo
package hid
@ -13,13 +13,15 @@ package hid
#cgo linux CFLAGS: -I./libusb/libusb -DDEFAULT_VISIBILITY="" -DOS_LINUX -D_GNU_SOURCE -DPOLL_NFDS_TYPE=int
#cgo linux,!android LDFLAGS: -lrt
#cgo darwin CFLAGS: -DOS_DARWIN
#cgo darwin LDFLAGS: -framework CoreFoundation -framework IOKit
#cgo darwin CFLAGS: -DOS_DARWIN -I./libusb/libusb
#cgo darwin LDFLAGS: -framework CoreFoundation -framework IOKit -lusb-1.0.0
#cgo windows CFLAGS: -DOS_WINDOWS
#cgo windows LDFLAGS: -lsetupapi
#cgo freebsd CFLAGS: -DOS_FREEBSD
#cgo freebsd LDFLAGS: -lusb
#ifdef OS_LINUX
#include <sys/poll.h>
#include <poll.h>
#include "os/threads_posix.c"
#include "os/poll_posix.c"
@ -35,15 +37,50 @@ package hid
#include "hidapi/libusb/hid.c"
#elif OS_DARWIN
#include <libusb.h>
#include "hidapi/mac/hid.c"
#elif OS_WINDOWS
#include "hidapi/windows/hid.c"
#elif OS_FREEBSD
#include <stdlib.h>
#include <libusb.h>
#include "hidapi/libusb/hid.c"
#endif
#if defined(OS_LINUX) || defined(OS_WINDOWS)
void copy_device_list_to_slice(struct libusb_device **data, struct libusb_device **list, int count)
{
int i;
struct libusb_device *current = *list;
for (i=0; i<count; i++)
{
data[i] = current;
current = list_entry(current->list.next, struct libusb_device, list);
}
}
#elif defined(OS_DARWIN) || defined(OS_FREEBSD)
void copy_device_list_to_slice(struct libusb_device **data, struct libusb_device **list, int count)
{
int i;
// No memcopy because the struct size isn't available for a sizeof()
for (i=0; i<count; i++)
{
data[i] = list[i];
}
}
#endif
const char *usb_strerror(int err)
{
return libusb_strerror(err);
}
*/
import "C"
import (
"errors"
"fmt"
"reflect"
"runtime"
"sync"
"unsafe"
@ -65,26 +102,132 @@ func Supported() bool {
return true
}
// genericEnumerate performs generic USB device enumeration
func genericEnumerate(vendorID uint16, productID uint16) ([]DeviceInfo, error) {
var infos []DeviceInfo
var ctx *C.struct_libusb_context
errCode := int(C.libusb_init((**C.struct_libusb_context)(&ctx)))
if errCode < 0 {
return nil, fmt.Errorf("Error while initializing libusb: %d", errCode)
}
var deviceListPtr **C.struct_libusb_device
count := C.libusb_get_device_list(ctx, (***C.struct_libusb_device)(&deviceListPtr))
if count < 0 {
return nil, fmt.Errorf("Error code listing devices: %d", count)
}
defer C.libusb_free_device_list(deviceListPtr, C.int(count))
deviceList := make([]*C.struct_libusb_device, count)
dlhdr := (*reflect.SliceHeader)(unsafe.Pointer(&deviceList))
C.copy_device_list_to_slice((**C.struct_libusb_device)(unsafe.Pointer(dlhdr.Data)), deviceListPtr, C.int(count))
for devnum, dev := range deviceList {
var desc C.struct_libusb_device_descriptor
errCode := int(C.libusb_get_device_descriptor(dev, &desc))
if errCode < 0 {
return nil, fmt.Errorf("Error getting device descriptor for generic device %d: %d", devnum, errCode)
}
// Start by checking the vendor id and the product id if necessary
if uint16(desc.idVendor) != vendorID || !(productID == 0 || uint16(desc.idProduct) == productID) {
continue
}
// Skip HID devices, they will be handled later
switch desc.bDeviceClass {
case 0:
/* Device class is specified at interface level */
for cfgnum := 0; cfgnum < int(desc.bNumConfigurations); cfgnum++ {
var cfgdesc *C.struct_libusb_config_descriptor
errCode = int(C.libusb_get_config_descriptor(dev, C.uint8_t(cfgnum), &cfgdesc))
if errCode != 0 {
return nil, fmt.Errorf("Error getting device configuration #%d for generic device %d: %d", cfgnum, devnum, errCode)
}
var ifs []C.struct_libusb_interface
ifshdr := (*reflect.SliceHeader)(unsafe.Pointer(&ifs))
ifshdr.Cap = int(cfgdesc.bNumInterfaces)
ifshdr.Len = int(cfgdesc.bNumInterfaces)
ifshdr.Data = uintptr(unsafe.Pointer(cfgdesc._interface))
for ifnum, ifc := range ifs {
var ifdescs []C.struct_libusb_interface_descriptor
ifdshdr := (*reflect.SliceHeader)(unsafe.Pointer(&ifdescs))
ifdshdr.Cap = int(ifc.num_altsetting)
ifdshdr.Len = int(ifc.num_altsetting)
ifdshdr.Data = uintptr(unsafe.Pointer(ifc.altsetting))
for _, alt := range ifdescs {
if alt.bInterfaceClass != 3 {
// Device isn't a HID interface, add them to the device list.
var endps []C.struct_libusb_endpoint_descriptor
endpshdr := (*reflect.SliceHeader)(unsafe.Pointer(&endps))
endpshdr.Cap = int(alt.bNumEndpoints)
endpshdr.Len = int(alt.bNumEndpoints)
endpshdr.Data = uintptr(unsafe.Pointer(alt.endpoint))
endpoints := make([]GenericEndpoint, alt.bNumEndpoints)
for ne, endpoint := range endps {
endpoints[ne] = GenericEndpoint{
Direction: GenericEndpointDirection(endpoint.bEndpointAddress) & GenericEndpointDirectionIn,
Address: uint8(endpoint.bEndpointAddress),
Attributes: uint8(endpoint.bmAttributes),
}
}
info := &GenericDeviceInfo{
Path: fmt.Sprintf("%x:%x:%d", vendorID, uint16(desc.idProduct), uint8(C.libusb_get_port_number(dev))),
VendorID: uint16(desc.idVendor),
ProductID: uint16(desc.idProduct),
device: &GenericDevice{
device: dev,
},
Endpoints: endpoints,
Interface: ifnum,
}
info.device.GenericDeviceInfo = info
infos = append(infos, info)
}
}
}
}
case 3:
// Device class is HID, skip it
continue
}
}
return infos, nil
}
// Enumerate returns a list of all the HID devices attached to the system which
// match the vendor and product id:
// - If the vendor id is set to 0 then any vendor matches.
// - If the product id is set to 0 then any product matches.
// - If the vendor and product id are both 0, all HID devices are returned.
func Enumerate(vendorID uint16, productID uint16) []DeviceInfo {
func Enumerate(vendorID uint16, productID uint16) ([]DeviceInfo, error) {
enumerateLock.Lock()
defer enumerateLock.Unlock()
infos, err := genericEnumerate(vendorID, productID)
if err != nil {
return nil, err
}
// Gather all device infos and ensure they are freed before returning
head := C.hid_enumerate(C.ushort(vendorID), C.ushort(productID))
if head == nil {
return nil
return nil, nil
}
defer C.hid_free_enumeration(head)
// Iterate the list and retrieve the device details
var infos []DeviceInfo
for ; head != nil; head = head.next {
info := DeviceInfo{
info := &HidDeviceInfo{
Path: C.GoString(head.path),
VendorID: uint16(head.vendor_id),
ProductID: uint16(head.product_id),
@ -104,11 +247,11 @@ func Enumerate(vendorID uint16, productID uint16) []DeviceInfo {
}
infos = append(infos, info)
}
return infos
return infos, nil
}
// Open connects to an HID device by its path name.
func (info DeviceInfo) Open() (*Device, error) {
func (info *HidDeviceInfo) Open() (Device, error) {
enumerateLock.Lock()
defer enumerateLock.Unlock()
@ -119,14 +262,14 @@ func (info DeviceInfo) Open() (*Device, error) {
if device == nil {
return nil, errors.New("hidapi: failed to open device")
}
return &Device{
return &HidDevice{
DeviceInfo: info,
device: device,
}, nil
}
// Device is a live HID USB connected device handle.
type Device struct {
// HidDevice is a live HID USB connected device handle.
type HidDevice struct {
DeviceInfo // Embed the infos for easier access
device *C.hid_device // Low level HID device to communicate through
@ -134,7 +277,7 @@ type Device struct {
}
// Close releases the HID USB device handle.
func (dev *Device) Close() error {
func (dev *HidDevice) Close() error {
dev.lock.Lock()
defer dev.lock.Unlock()
@ -149,7 +292,7 @@ func (dev *Device) Close() error {
//
// Write will send the data on the first OUT endpoint, if one exists. If it does
// not, it will send the data through the Control Endpoint (Endpoint 0).
func (dev *Device) Write(b []byte) (int, error) {
func (dev *HidDevice) Write(b []byte) (int, error) {
// Abort if nothing to write
if len(b) == 0 {
return 0, nil
@ -192,7 +335,7 @@ func (dev *Device) Write(b []byte) (int, error) {
}
// Read retrieves an input report from a HID device.
func (dev *Device) Read(b []byte) (int, error) {
func (dev *HidDevice) Read(b []byte) (int, error) {
// Aborth if nothing to read
if len(b) == 0 {
return 0, nil
@ -226,3 +369,91 @@ func (dev *Device) Read(b []byte) (int, error) {
}
return read, nil
}
// Type identify the device as a HID device
func (dev *HidDevice) Type() DeviceType {
return dev.DeviceInfo.Type()
}
// Open tries to open the USB device represented by the current DeviceInfo
func (gdi *GenericDeviceInfo) Open() (Device, error) {
var handle *C.struct_libusb_device_handle
errCode := int(C.libusb_open(gdi.device.device, (**C.struct_libusb_device_handle)(&handle)))
if errCode < 0 {
return nil, fmt.Errorf("Error opening generic USB device %v, code %d", gdi.device.handle, errCode)
}
gdi.device.handle = handle
// QUESTION: ai-je deja initialie le GDI ?
// GenericDeviceInfo: gdi,
// handle: handle,
// }
for _, endpoint := range gdi.Endpoints {
switch {
case endpoint.Direction == GenericEndpointDirectionOut && endpoint.Attributes == GenericEndpointAttributeInterrupt:
gdi.device.WEndpoint = endpoint.Address
case endpoint.Direction == GenericEndpointDirectionIn && endpoint.Attributes == GenericEndpointAttributeInterrupt:
gdi.device.REndpoint = endpoint.Address
}
}
if gdi.device.REndpoint == 0 || gdi.device.WEndpoint == 0 {
return nil, fmt.Errorf("Missing endpoint in device %#x:%#x:%d", gdi.VendorID, gdi.ProductID, gdi.Interface)
}
return gdi.device, nil
}
// GenericDevice represents a generic USB device
type GenericDevice struct {
*GenericDeviceInfo // Embed the infos for easier access
REndpoint uint8
WEndpoint uint8
device *C.struct_libusb_device
handle *C.struct_libusb_device_handle
lock sync.Mutex
}
// Write implements io.ReaderWriter
func (gd *GenericDevice) Write(b []byte) (int, error) {
gd.lock.Lock()
defer gd.lock.Unlock()
out, err := interruptTransfer(gd.handle, gd.WEndpoint, b)
return len(out), err
}
// Read implements io.ReaderWriter
func (gd *GenericDevice) Read(b []byte) (int, error) {
gd.lock.Lock()
defer gd.lock.Unlock()
out, err := interruptTransfer(gd.handle, gd.REndpoint, b)
return len(out), err
}
// Close a previously opened generic USB device
func (gd *GenericDevice) Close() error {
gd.lock.Lock()
defer gd.lock.Unlock()
if gd.handle != nil {
C.libusb_close(gd.handle)
gd.handle = nil
}
return nil
}
// interruptTransfer is a helpler function for libusb's interrupt transfer function
func interruptTransfer(handle *C.struct_libusb_device_handle, endpoint uint8, data []byte) ([]byte, error) {
var transferred C.int
errCode := int(C.libusb_interrupt_transfer(handle, (C.uchar)(endpoint), (*C.uchar)(&data[0]), (C.int)(len(data)), &transferred, (C.uint)(0)))
if errCode != 0 {
return nil, fmt.Errorf("Interrupt transfer error: %s", C.GoString(C.usb_strerror(C.int(errCode))))
}
return data[:int(transferred)], nil
}

53
vendor/github.com/karalabe/hid/usb.go generated vendored Normal file
View File

@ -0,0 +1,53 @@
// hid - Gopher Interface Devices (USB HID)
// Copyright (c) 2019 Péter Szilágyi, Guillaume Ballet. All rights reserved.
//
// This file is released under the 3-clause BSD license. Note however that Linux
// support depends on libusb, released under GNU LGPL 2.1 or later.
// Package usb provide interfaces for generic USB devices.
package hid
// DeviceType represents the type of a USB device (generic or HID)
type DeviceType int
// List of supported device types
const (
DeviceTypeGeneric DeviceType = 0
DeviceTypeHID DeviceType = 1
)
// Enumerate returns a list of all the HID devices attached to the system which
// match the vendor and product id:
// - If the vendor id is set to 0 then any vendor matches.
// - If the product id is set to 0 then any product matches.
// - If the vendor and product id are both 0, all HID devices are returned.
// func Enumerate(vendorID uint16, productID uint16) []DeviceInfo {
// }
// DeviceInfo is a generic libusb info interface
type DeviceInfo interface {
// Type returns the type of the device (generic or HID)
Type() DeviceType
// Platform-specific device path
GetPath() string
// IDs returns the vendor and product IDs for the device,
// as well as the endpoint id and the usage page.
IDs() (uint16, uint16, int, uint16)
// Open tries to open the USB device represented by the current DeviceInfo
Open() (Device, error)
}
// Device is a generic libusb device interface
type Device interface {
Close() error
Write(b []byte) (int, error)
Read(b []byte) (int, error)
// Type returns the type of the device (generic or HID)
Type() DeviceType
}

2
vendor/github.com/karalabe/hid/wchar.go generated vendored
View File

@ -7,7 +7,7 @@
// https://github.com/orofarne/gowchar/blob/master/LICENSE
// +build !ios
// +build linux darwin windows
// +build freebsd linux darwin windows
package hid

6
vendor/vendor.json vendored
View File

@ -267,10 +267,10 @@
"revisionTime": "2017-04-30T22:20:11Z"
},
{
"checksumSHA1": "6XsjAARQFvlW6dS15al0ibTFPOQ=",
"checksumSHA1": "p6UjFsx/1ACWAhsdEOWrXAHptGY=",
"path": "github.com/karalabe/hid",
"revision": "d815e0c1a2e2082a287a2806bc90bc8fc7b276a9",
"revisionTime": "2018-11-28T19:21:57Z",
"revision": "e40407cce1c217644c09da5415bbfb07d330ea5e",
"revisionTime": "2019-05-28T15:16:06Z",
"tree": true
},
{